#include <bits/stdc++.h>

#define ll long long
#define ull unsigned long long
#define uint unsigned int

#define YES cout << "YES" << '\n'
#define NO cout << "NO" << '\n'
#define endl '\n'
const int INF = 1e9;
const int MOD = 998244353;
using namespace std;

/*思考

*/

void solve() {
    string num;
    cin >> num;
    int n = num.size();
    int ans = 10;
    for (int i = 0; i < n; i++) {
        int x = num[i] - '0';
        ans = ans < x ? ans : x;
    }
    cout << ans << endl;
}

int main() {
    ios::sync_with_stdio(0);
    cin.tie(0);
    int t = 0;
    cin >> t;
    while (t--) solve();
    return 0;
}
